Gravitational Shell Theorem (Spherical Shell) (Inside hollow shell: E=0; outside: E=GM/r²)
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Inside hollow shell: E=0; outside: E=GM/r²
What each symbol means
| Symbol | What it stands for |
|---|---|
| M | Total mass of thin spherical shell (kg) |
| R | Radius of shell (m) |
| r | Distance of field point from centre (m) |
When to use this
Uniform thin spherical shell of mass M. Interior cavity: field zero. Exterior r≥R: field as if M concentrated at centre.